Where can I buy an 11x17" "floating frame" / "float frame"?

You'd think this would be an easy search. 11x17 is a fairly standard size, and indeed a lot of regular picture frames come in this size. But I need a a float frame (it's just a couple pieces of glass in a frame with no backing, so that you can flip it over and view the back of your paper). And apparently... show more You'd think this would be an easy search. 11x17 is a fairly standard size, and indeed a lot of regular picture frames come in this size. But I need a a float frame (it's just a couple pieces of glass in a frame with no backing, so that you can flip it over and view the back of your paper). And apparently Amazon, Michael's, and as far as I can tell the ENTIRE INTERNET does not have a single float frame in the 11x17 size. Does anyone know where I can find one?
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